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Thread: S3900 S4700 dbx DriveRack 260

  1. #1
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    S3900 S4700 dbx DriveRack 260

    S3900 BiWired

    Courtesy of Greg Timbers.
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    S4700 BiWired

    Courtesy of Greg Timbers.
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  3. #3
    Mctwins
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    Hallo!

    Looks nice

    Is it measurerd in a anechoic chamber or in a ordinary room?

    Why the strange freq response above 10kHz in both speakers?

    dbx260 is a nice DSP

  4. #4
    Senior Member Mostlydiy's Avatar
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    Lovely! Waiting for the K2s9900 numbers

    I appreciate the time you guys put in to this "DSP conversion project". Its a rather easy thing to try out when provided with these eq figures. Kudos!

    /Mostly

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    @4313B,

    When you say(or G.T) biwired, how is it connected? Is there only one amp and bi-wire cable for left and right speaker or two amps for left and right speakers and separate cables from left and right out from respectively amp?

    If one amp is used how does the crossover work? To me this is impossible!

    Could you clarify?

  6. #6
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    BTW, the dbx 260 is a great unit. If I could I would get my hands on a dbx4800, period

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    , yes there is two binding post, or what do you mean?

    EDIT! I get it now The crossover points is not used on the dbx, only the parametric filters, right

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    Quote Originally Posted by Mctwins View Post
    Why the strange freq response above 10kHz in both speakers?
    UHF unhooked. The focus was on the LF and HF.


    As one can see, this data is hot off the press.

    As for the DD65000 and DD67000, they aren't finished yet.

  10. #10
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    Will he do it for 4365 as well? Please please pleeeeaase!
    I am really tempted to go active.

  11. #11
    Senior Member spkrman57's Avatar
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    I would hope...

    Quote Originally Posted by bubbleboy76 View Post
    Will he do it for 4365 as well? Please please pleeeeaase!
    I am really tempted to go active.
    But I think the 4365 has already been superceded with the Nd stuff.

    I have 1501Fe's and would love to see the possibilities.

    Ron
    JBL Pro for home use!

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    Quote Originally Posted by Bobecca View Post
    , yes there is two binding post, or what do you mean?

    EDIT! I get it now The crossover points is not used on the dbx, only the parametric filters, right
    I have to correct myself here. I really dont understand how it is implemented in dbx260 or how the connection is done. What does the INPUT stands for, is it prePEQ or postPEQ?? I asume it is the prePEQ that is used here.

    In the dbx260 it is not possible to have more than seven prePEQ(first and last is only shelving type of filter) and four postPEQ(on each output).

    How is it possible to have 10 parametric settings on that provided chart(S4700)?

    It can not be biwired in this config. It has to be two amps involved!

    Am I missing something???????

  13. #13
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    Quote Originally Posted by Bobecca View Post
    I have to correct myself here. I really dont understand how it is implemented in dbx260 or how the connection is done. What does the INPUT stands for, is it prePEQ or postPEQ?? I asume it is the prePEQ that is used here.

    In the dbx260 it is not possible to have more than seven prePEQ(first and last is only shelving type of filter) and four postPEQ(on each output).

    How is it possible to have 10 parametric settings on that provided chart(S4700)?

    It can not be biwired in this config. It has to be two amps involved!

    Am I missing something???????
    Ah! There might be symantics involved here. By "bi-wire", G.T. means that the passive networks are left in place and that the LF and HF inputs are used separately. One amp on the LF and one amp on the HF. The dbx comes before the LF and HF amps.

    I've never looked at the dbx manual.

  14. #14
    Mctwins
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    Quote Originally Posted by 4313B View Post


    UHF unhooked. The focus was on the LF and HF.


    As one can see, this data is hot off the press.

    As for the DD65000 and DD67000, they aren't finished yet.
    Thanks, I realized it later

    G.T can do a test with PA+ and JBL 4319, if he has the time

  15. #15
    Mctwins
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    Quote Originally Posted by 4313B View Post
    Ah! There might be symantics involved here. By "bi-wire", G.T. means that the passive networks are left in place and that the LF and HF inputs are used separately. One amp on the LF and one amp on the HF. The dbx comes before the LF and HF amps.

    I've never looked at the dbx manual.
    Ok, the amp question has been answerd

    Still don't get it about the numbers of PEQ(10 total in S4700) How did G.T do this??

    Does he mix prePEQ and postPEQ together??

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